Heat dissipation system and liquid cooling unit

Abstract

The utility model belongs to the technical field of energy storage, and discloses a heat dissipation system and a liquid cooling unit, and the heat dissipation system comprises a cabinet, a first silencing part, and a cabinet door. The cabinet is provided with a heat dissipation cavity, one side of the heat dissipation cavity is provided with an opening, and the bottom wall of the heat dissipation cavity is provided with a heat dissipation fan; the first silencing piece is provided with a sound absorption cavity and installed on the bottom wall, and at least part of the cooling fan is located in the sound absorption cavity. The cabinet door is installed at the opening and provided with a ventilation hole, a second silencing piece is arranged between the cabinet door and the cooling fan, and the second silencing piece right faces the air outlet end of the cooling fan. And the first silencing part and the second silencing part are matched to absorb most noise emitted by the heat dissipation fan in the heat dissipation cavity, and noise pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a heat dissipation system and a liquid cooling unit. Background Art

[0002] With the development of clean energy, the collection efficiency of clean energy such as solar energy, water energy, and wind energy is getting higher and higher. However, due to objective reasons such as the environment and irregular energy sources, clean energy has too strong volatility and cannot be directly and stably supplied for use. It is necessary to be equipped with an energy storage system to optimize the output of new energy power stations and suppress fluctuations. However, the energy storage system has the risk of thermal runaway, which not only affects the performance of the energy storage system but also may pose a threat to the safe operation of the power station. Therefore, in the current energy storage systems on the market, in order to solve the risk of thermal runaway of the battery cells and cool down the energy storage system, a liquid cooling control unit is used. However, the existing large-scale energy storage liquid cooling units usually include a fan structure, and the fan will generate noise greater than 80 dB during operation, causing serious environmental noise pollution. Therefore, there is an urgent need for a new type of heat dissipation system to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a heat dissipation system, which can effectively absorb the noise of the heat dissipation fan and reduce noise pollution.

[0004] To achieve this purpose, the utility model adopts the following technical solutions: A heat dissipation system includes a cabinet, a first sound-absorbing member, and a cabinet door; a heat dissipation cavity is provided in the cabinet, one side of the heat dissipation cavity is open along the horizontal direction, a heat dissipation fan is provided on the bottom wall opposite to the heat dissipation cavity and the opening, and the air outlet end of the heat dissipation fan faces the opening; the first sound-absorbing member is provided with a sound-absorbing cavity, the first sound-absorbing member is installed on the bottom wall and at least part of the heat dissipation fan is located in the sound-absorbing cavity; the cabinet door is installed at the opening and is provided with ventilation holes, and a second sound-absorbing member is provided between the cabinet door and the heat dissipation fan, and the second sound-absorbing member faces the air outlet end of the heat dissipation fan.

[0005] Preferably, the first sound-absorbing member includes a first sound-absorbing cotton and a second sound-absorbing cotton. The first sound-absorbing cotton is connected to the bottom wall, the first sound-absorbing cotton is provided with a through hole for the heat dissipation fan to pass through, two sides of the first sound-absorbing cotton are turned over to form a first flanging that fits with the inner side wall of the heat dissipation cavity, the second sound-absorbing cotton is located above the heat dissipation fan and is connected to the upper wall of the heat dissipation cavity, and the second sound-absorbing cotton and the first sound-absorbing cotton enclose to form the sound-absorbing cavity.

[0006] Preferably, the second sound-absorbing cotton is provided with a second flanging, and the second flanging is detachably connected to the first sound-absorbing cotton.

[0007] Preferably, the cooling fan is connected to the bottom wall through a plurality of connecting members, and the plurality of connecting members are arranged at intervals along the circumferential direction of the cooling fan. A plurality of clamping grooves are formed on the hole wall of the through hole, and the clamping grooves and the connecting members are in one-to-one correspondence and are clamped and matched.

[0008] Preferably, a plurality of the cooling fans are provided, and the first sound-absorbing member, the second sound-absorbing member and the cooling fans are arranged in one-to-one correspondence. Along the vertical direction, two adjacent first sound-absorbing cotton corresponding to the two cooling fans are detachably connected.

[0009] Preferably, a display member is arranged in the heat dissipation cavity, the display member is electrically connected to the cooling fan, and the first sound-absorbing member, the second sound-absorbing member and the cabinet door are respectively provided with a hollow structure for the display member to pass through.

[0010] Preferably, first connecting portions are symmetrically arranged on the inner side wall of the heat dissipation cavity, second connecting portions are arranged on both sides of the cabinet door, and the first connecting portions and the second connecting portions are detachably connected.

[0011] Preferably, the cabinet door is provided with a supporting portion, the second sound-absorbing member is connected to the supporting portion, and the ventilation holes are arranged around the supporting portion.

[0012] Preferably, the second sound-absorbing member includes a third sound-absorbing cotton, and the third sound-absorbing cotton is provided with an avoidance portion for avoiding the motor of the cooling fan.

[0013] Another object of the present invention is to provide a liquid cooling unit, which can effectively absorb the noise of the cooling fan and reduce noise pollution.

[0014] To achieve this purpose, the present invention adopts the following technical solutions: a liquid cooling unit, including a heat exchange tube and the above-mentioned heat dissipation system, the heat exchange tube is installed in the cabinet, and the air inlet end of the cooling fan faces the heat exchange tube.

[0015] The beneficial effects of the present invention: By providing the first sound-absorbing member and the second sound-absorbing member, the first sound-absorbing member forms a sound-absorbing cavity around the cooling fan, so that the first sound-absorbing member can absorb the noise around the cooling fan and at the bottom wall during operation, and the second sound-absorbing member can absorb the noise at the air outlet end of the cooling fan during operation. The first sound-absorbing member and the second sound-absorbing member cooperate to absorb most of the noise generated by the cooling fan in the heat dissipation cavity and reduce noise pollution.

[0016] The present invention also provides a liquid cooling unit, which can effectively absorb the noise of the cooling fan and reduce noise pollution. Description of the Drawings

[0017] Figure 1 is the front view of the heat dissipation system of the present invention;

[0018] Figure 2 is an exploded view of the heat dissipation system of the present utility model;

[0019] Figure 3 is a schematic structural view of the first sound insulation member of the present utility model;

[0020] Figure 4 is Figure 1 a cross-sectional view taken along line A-A in

[0021] In the figure: 100, cabinet; 110, heat dissipation cavity; 111, bottom wall; 120, installation cavity; 121, air inlet; 130, heat dissipation fan; 131, motor; 132, connecting member; 140, display member; 150, first connecting portion; 200, first sound insulation member; 210, sound absorption portion; 220, first sound absorption cotton; 221, first flanging; 222, through hole; 223, card slot; 230, second sound absorption cotton; 231, second flanging; 300, cabinet door; 310, second sound insulation member; 311, third sound absorption cotton; 3111, avoidance portion; 320, second connecting portion; 330, supporting portion. Specific embodiments

[0022] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0023] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0024] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0026] Refer to Figures 1 to 4 As shown, a heat dissipation system provided by an embodiment of the present utility model includes a cabinet 100, a first sound-absorbing member 200 and a cabinet door 300; the cabinet 100 is in a vertical shape, with a heat dissipation cavity 110 and an installation cavity 120 inside the cabinet 100. The installation cavity 120 is used for installing the component to be dissipated, the heat dissipation cavity 110 is located on one side of the installation cavity 120 and is communicated with the installation cavity 120, and the installation cavity 120 is provided with an air inlet 121. One side of the heat dissipation cavity 110 is open in the horizontal direction, the heat dissipation cavity 110 has a bottom wall 111 opposite to the opening, the bottom wall 111 is provided with a heat dissipation fan 130, and the air outlet end of the heat dissipation fan 130 faces the opening.

[0027] The first sound-absorbing member 200 is provided with a sound-absorbing cavity. The first sound-absorbing member 200 is installed on the bottom wall 111 and at least part of the heat dissipation fan 130 is located in the sound-absorbing cavity. Specifically, the first sound-absorbing member 200 is provided with a sound-absorbing portion 210 protruding from the bottom wall 111, and the sound-absorbing portion 210 is arranged around the outer periphery of at least part of the heat dissipation fan 130. The sound-absorbing portion 210 and the first sound-absorbing member 200 located on the bottom wall 111 cooperate to form the sound-absorbing cavity; the cabinet door 300 matches the shape of the opening, the cabinet door 300 is installed at the opening and is provided with ventilation holes, and a second sound-absorbing member 310 is provided between the cabinet door 300 and the heat dissipation fan 130. On the plane where the cabinet door 300 is located, the second sound-absorbing member 310 faces the air outlet end of the heat dissipation fan 130.

[0028] It should be noted that at least part of the projection of the second sound-absorbing member 310 is located inside the projection of the cooling fan 130. In other words, the projection of the second sound-absorbing member 310 on the surface where the cabinet door 300 is located cannot cover the projection of the cooling fan 130 on the surface where the cabinet door 300 is located, so that the air flow blown out by the cooling fan 130 can reach the ventilation opening through the outside of the second sound-absorbing member 310. Optionally, the first sound-absorbing member 200 and the second sound-absorbing member 310 can be made of lightweight sound-absorbing materials such as sound-absorbing cotton, felt or corrugated cardboard, which will not be elaborated here.

[0029] It can be understood that by providing the first sound-absorbing member 200 and the second sound-absorbing member 310, when the cooling fan 130 operates, at least part of the cooling fan 130 is located inside the sound-absorbing cavity formed by the first sound-absorbing member 200, and the noise generated when the cooling fan 130 operates can be absorbed by the bottom wall and side walls of the sound-absorbing cavity. Specifically, the first sound-absorbing member 200 (i.e., the bottom wall of the sound-absorbing cavity) can absorb the noise at the connection between the cooling fan 130 and the bottom wall 111, and the sound-absorbing portion 210 of the first sound-absorbing member 200 (i.e., the side wall of the sound-absorbing cavity) can absorb the noise around the fan blades of the cooling fan 130. The second sound-absorbing member 310 can absorb the noise at the air outlet end of the cooling fan 130. The first sound-absorbing member 200 and the second sound-absorbing member 310 cooperate to absorb most of the noise generated by the cooling fan 130 in the cooling cavity 110. After testing, the noise above 80 dB can be reduced to below 75 dB, thereby reducing noise pollution and keeping the cooling system working quietly.

[0030] Furthermore, first connecting portions 150 are symmetrically arranged on the inner side walls of the cooling cavity 110, and second connecting portions 320 are arranged on both sides of the cabinet door 300. The first connecting portions 150 and the second connecting portions 320 are detachably connected. Optionally, the first connecting portion 150 can be set as a first plate member, the second connecting portion 320 can be set as a second plate member, the first plate member and the second plate member are respectively provided with hole-slot structures, and the first plate member and the second plate member are detachably connected by fasteners such as bolts, screws, pin shafts and snap rings; the first connecting portions 150 and the second connecting portions 320 can also be set as mutually matching snap-fastener slots, tenon-mortise structures, etc., which will not be elaborated here.

[0031] By providing the first connecting portions 150 and the second connecting portions 320, the cabinet door 300 is detachably installed on the cabinet 100, which facilitates the user to load and unload the cabinet door 300, and further facilitates the user to repair, maintain or replace the cooling fan 130, the first sound-absorbing member 200 or the second sound-absorbing member 310, reducing the later maintenance cost of the cooling system. In addition, the first connecting portions 150 are arranged on the inner side walls of the cooling cavity 110, so that at least part of the cabinet door 300 is received in the cooling cavity 110, reducing the thickness dimension of the cooling system in the air outlet direction of the cooling fan 130, and at the same time, facilitating the positioning and installation of the cabinet door 300.

[0032] Refer toFigure 2 and Figure 3 As shown, it can be understood that the first sound-absorbing cotton 200 includes a first sound-absorbing cotton 220 and a second sound-absorbing cotton 230. The first sound-absorbing cotton 220 is connected to the bottom wall 111. Optionally, the first sound-absorbing cotton 220 can be detachably connected to the bottom wall 111 by screws, pins, etc., or can be bonded to the bottom wall 111 by adhesive, or can be first bonded to the bottom wall 111 by adhesive and then bolted to the bottom wall 111 to improve the installation stability, which will not be repeated here.

[0033] The first sound-absorbing cotton 220 is provided with a through hole 222, and the heat dissipation fan 130 is provided in the through hole 222. The two sides of the first sound-absorbing cotton 220 are folded to form a first flange 221 that fits the inner wall of the heat dissipation cavity 110. Optionally, the first flange 221 can also be bonded or detachably connected to the inner wall of the heat dissipation cavity 110, which will not be described in detail here. The second sound-absorbing cotton 230 is located above the heat dissipation fan 130. The second sound-absorbing cotton 230 is attached to and connected to the upper wall of the heat dissipation cavity 110. The connection structure of the second sound-absorbing cotton 230 can refer to the description of the first sound-absorbing cotton 220 in the previous text, which will not be described in detail here. Optionally, the second sound-absorbing cotton 230 can be integrally formed with the first sound-absorbing cotton 220, or it can be detachably connected to the first sound-absorbing cotton 220, which will not be described in detail here. The second sound absorbing cotton 230 cooperates with the first flanges 221 on both sides of the heat dissipation fan 130 to form a sound absorbing portion 210 surrounding the outer periphery of the heat dissipation fan 130. At this time, the second sound absorbing cotton 230 and the first sound absorbing cotton 220 are surrounded to form a sound absorbing cavity.

[0034] The first sound-absorbing member 200 is configured as the first sound-absorbing cotton 220 and the second sound-absorbing cotton 230, which can effectively simplify the structure of the first sound-absorbing member 200 and facilitate the design and assembly of the first sound-absorbing member 200. At the same time, the first flange 221 of the first sound-absorbing cotton 220 fits the inner wall of the heat dissipation cavity 110, and the second sound-absorbing cotton 230 fits the upper wall of the heat dissipation cavity 110, so that the first sound-absorbing cotton 220 and the second sound-absorbing cotton 230 have regular shapes and small volumes, which are convenient for installation and transportation by end users.

[0035] In addition, when the heat dissipation system is used in an outdoor environment, rainwater may enter the heat dissipation cavity 110 on rainy days. The first flange 221 and the second sound-absorbing cotton 230 cooperate to surround the two sides and the upper space of the outer periphery of the heat dissipation fan 130, so that the space below the heat dissipation fan 130 is vacant, which can avoid the accumulation of rainwater where the sound-absorbing cotton is set, affecting the use of the electrical system inside the cabinet 100, and effectively improve the structural rationality of the first muffler 200.

[0036] Furthermore, a second flange 231 is provided on one side of the second sound-absorbing cotton 230 , and the second flange 231 is detachably connected to a side of the first sound-absorbing cotton 220 facing away from the bottom wall 111 .

[0037] By providing the second flanging 231, on the one hand, after the user assembles the first sound-absorbing cotton 220, the second flanging 231 can be abutted against the first sound-absorbing cotton 220, and the second sound-absorbing cotton 230 can be abutted against the upper wall of the heat dissipation cavity 110, thereby positioning the second sound-absorbing cotton 230 and improving the assembly convenience of the second sound-absorbing cotton 230; on the other hand, after the second sound-absorbing cotton 230 is fixed to the upper wall of the heat dissipation cavity 110, it can also be fixedly connected to the first sound-absorbing cotton 220 through the second flanging 231, further improving the installation stability of the second sound-absorbing cotton 230.

[0038] Referring to Figure 2 and Figure 4 As shown, it can be understood that the second sound-damping member 310 includes a third sound-absorbing cotton 311, and the third sound-absorbing cotton 311 is provided with an avoidance portion 3111 for avoiding the motor 131 of the heat dissipation fan 130. Optionally, the outer shape of the third sound-absorbing cotton 311 can be circular, rectangular, oval, etc., which will not be elaborated here.

[0039] The second sound-damping member 310 is set as the third sound-absorbing cotton 311, and the third sound-absorbing cotton 311 can cooperate with the first sound-absorbing cotton 220 and the second sound-absorbing cotton 230 in the first sound-damping member 200 to absorb noise, improve the structural consistency of the heat dissipation system, and reduce the material cost of the heat dissipation system. In addition, the third sound-absorbing cotton 311 is provided with an avoidance portion 3111 for avoiding the motor 131 of the heat dissipation fan 130, which can prevent the motor 131 of the heat dissipation fan 130 from interfering with the third sound-absorbing cotton 311 during operation and affecting the installation of the third sound-absorbing cotton 311.

[0040] Furthermore, the cabinet door 300 is provided with a support portion 330, and the support portion 330 is a plate member that matches the outer shape of the third sound-absorbing cotton 311. The second sound-damping member 310 is connected to the support portion 330, and ventilation holes are arranged around the support portion 330. Specifically, the third sound-absorbing cotton 311 can be detachably connected to the support portion 330 by screws, pins, etc., or can be adhesively bonded to the support portion 330 by back glue, or can be adhesively bonded to the support portion 330 by back glue first and then bolted to the support portion 330 to improve the installation stability.

[0041] By providing the support portion 330 to install the third sound-absorbing portion 210, the back space of the cabinet door 300 is reasonably utilized, the installation structure of the third sound-absorbing cotton 311 is simplified, and the space utilization rate of the heat dissipation system is improved.

[0042] Referring to Figure 2As shown, it can be understood that there are multiple heat dissipation fans 130. Optionally, the multiple heat dissipation fans 130 are arranged at intervals in the vertical direction, or can be arranged in a matrix on the bottom wall 111. The first sound insulation member 200, the second sound insulation member 310 and the heat dissipation fans 130 are arranged in one-to-one correspondence. Specifically, the first sound-absorbing cotton 220, the third sound-absorbing cotton 311 and the heat dissipation fans 130 are arranged in one-to-one correspondence. In the vertical direction, the heat dissipation fans 130 in the same column correspond to the same second sound-absorbing cotton 230, and the two first sound-absorbing cottons 220 corresponding to two adjacent heat dissipation fans 130 are detachably connected. Optionally, in the vertical direction, two adjacent third sound-absorbing cottons 311 can be integrally formed or can be independently arranged.

[0043] By arranging multiple heat dissipation fans 130, the heat dissipation efficiency of the heat dissipation system can be greatly improved. In the vertical direction, the first sound-absorbing cottons 220 corresponding to the multiple heat dissipation fans 130 are independently arranged, and the adjacent first sound-absorbing cottons 220 are detachably connected, which can further simplify the structure of the first sound insulation member 200, facilitate the mass production of the first sound-absorbing cotton 220, and at the same time facilitate the user to transport and assemble the first sound-absorbing cotton 220, further improving the assembly convenience of the first sound insulation member 200.

[0044] Refer to Figure 2 and Figure 4 As shown, it can be understood that the heat dissipation fan 130 is connected to the bottom wall 111 through multiple connecting pieces 132. Specifically, the connecting piece 132 is a bent sheet metal part. One end of the connecting piece 132 is connected to the motor 131 of the heat dissipation fan 130, and the other end is bent towards the bottom wall 111 and connected to the bottom wall 111. The multiple connecting pieces 132 are arranged at intervals along the circumferential direction of the heat dissipation fan 130. The first sound-absorbing cotton 220 is provided with multiple card slots 223, and the card slots 223 are opened on the hole wall of the through hole 222. The card slots 223 and the connecting pieces 132 are in one-to-one correspondence and are snap-fitted.

[0045] By arranging the card slots 223, the card slots 223 are snap-fitted with the connecting pieces 132 outside the heat dissipation fan 130. While avoiding interference between the connecting pieces 132 and the first sound-absorbing cotton 220 and affecting the installation of the first sound-absorbing cotton 220, the first sound-absorbing cotton 220 can be positioned and fixed, effectively improving the installation stability and assembly convenience of the first sound-absorbing cotton 220.

[0046] Further, a display member 140 is provided in the heat dissipation cavity 110. Optionally, the display member 140 can be set as multiple independent lamp beads or can be set as a display screen, which will not be elaborated here. The display member 140 is electrically connected to the heat dissipation fan 130 to display the operation status of the heat dissipation fan 130. The first sound insulation member 200, the second sound insulation member 310 and the cabinet door 300 are respectively provided with a hollow structure for the display member 140 to pass through, and the hollow structure is a hole body or a groove body matching the outer shape of the display member 140.

[0047] By providing the display member 140, and providing hollow structures through which the display member 140 passes in the first sound insulation member 200, the second sound insulation member 310, and the cabinet door 300, the user can quickly judge the operation condition of the cooling fan 130 without opening the cabinet door 300, which helps the user to timely discover and handle possible operation problems of the cooling fan 130, and effectively improves the user experience.

[0048] The utility model further provides a liquid cooling unit, which includes a heat exchange tube and the above-mentioned heat dissipation system. The heat exchange tube is installed in the cabinet, and the air inlet end of the cooling fan is arranged towards the heat exchange tube.

[0049] The liquid cooling unit provided by the embodiment of the utility model includes the heat dissipation system in the above embodiment. Therefore, the liquid cooling unit provided by the embodiment of the utility model also has the beneficial effects described in the above embodiment, which will not be elaborated here.

[0050] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, rather than limiting the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A heat dissipation system, characterized in that, Including: A cabinet (100) is provided with a heat dissipation cavity (110). One side of the heat dissipation cavity (110) is open in the horizontal direction. A heat dissipation fan (130) is provided on the bottom wall (111) opposite to the opening of the heat dissipation cavity (110). The air outlet end of the heat dissipation fan (130) faces the opening. A first sound-absorbing member (200) is provided with a sound-absorbing cavity. The first sound-absorbing member (200) is installed on the bottom wall (111), and at least part of the heat dissipation fan (130) is located in the sound-absorbing cavity. A cabinet door (300) is installed at the opening and is provided with ventilation holes. A second sound-absorbing member (310) is provided between the cabinet door (300) and the heat dissipation fan (130). The second sound-absorbing member (310) faces the air outlet end of the heat dissipation fan (130).

2. The heat dissipation system according to claim 1, wherein The first sound-absorbing member (200) includes a first sound-absorbing cotton (220) and a second sound-absorbing cotton (230). The first sound-absorbing cotton (220) is connected to the bottom wall (111). The first sound-absorbing cotton (220) is provided with a through hole (222) for the heat dissipation fan (130) to pass through. First flanges (221) that fit the inner side walls of the heat dissipation cavity (110) are formed by folding both sides of the first sound-absorbing cotton (220). The second sound-absorbing cotton (230) is located above the heat dissipation fan (130) and is connected to the upper wall of the heat dissipation cavity (110). The second sound-absorbing cotton (230) and the first sound-absorbing cotton (220) enclose to form the sound-absorbing cavity.

3. The heat dissipation system according to claim 2, wherein The second sound-absorbing cotton (230) is provided with a second flange (231). The second flange (231) is detachably connected to the first sound-absorbing cotton (220).

4. The heat dissipation system according to claim 2, characterized in that, The heat dissipation fan (130) is connected to the bottom wall (111) through a plurality of connecting members (132). The plurality of connecting members (132) are spaced along the circumferential direction of the heat dissipation fan (130). A plurality of clamping grooves (223) are formed on the hole wall of the through hole (222). The clamping grooves (223) and the connecting members (132) correspond one by one and are in clamping fit.

5. The heat dissipation system according to any one of claims 2-4, characterized in that, A plurality of heat dissipation fans (130) are provided. The first sound-absorbing member (200), the second sound-absorbing member (310) and the heat dissipation fans (130) are provided in one-to-one correspondence. Along the vertical direction, the two first sound-absorbing cottons (220) corresponding to two adjacent heat dissipation fans (130) are detachably connected.

6. The heat dissipation system according to any one of claims 1-4, characterized in that, A display member (140) is provided in the heat dissipation cavity (110). The display member (140) is electrically connected to the heat dissipation fan (130). The first sound-absorbing member (200), the second sound-absorbing member (310) and the cabinet door (300) are respectively provided with hollow structures for the display member (140) to pass through.

7. The heat dissipation system according to claim 1, characterized in that, First connecting parts (150) are symmetrically provided on the inner side walls of the heat dissipation cavity (110). Second connecting parts (320) are provided on both sides of the cabinet door (300). The first connecting parts (150) and the second connecting parts (320) are detachably connected.

8. The heat dissipation system according to claim 1 or 7, characterized in that, The cabinet door (300) is provided with a support portion (330), the second sound-absorbing member (310) is connected to the support portion (330), and the ventilation holes are arranged around the support portion (330).

9. The heat dissipation system according to claim 1, wherein The second sound-absorbing member (310) includes a third sound-absorbing cotton (311), and the third sound-absorbing cotton (311) is provided with an avoidance portion (3111) for avoiding the motor (131) of the heat dissipation fan (130).

10. Liquid cooling unit, characterized in that, It includes a heat exchange tube and the heat dissipation system according to any one of claims 1-9. The heat exchange tube is installed in the cabinet (100), and the air inlet end of the heat dissipation fan (130) is arranged facing the heat exchange tube.

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